<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>background-origin</title>
  <style>
    .box1 {
      width: 400px;
      height: 400px;
      background-color: skyblue;
      padding: 50px;
      border: 50px dashed rgba(255, 0, 0, 0.7);
      font-size: 40px;
      margin: 0 auto;
      /* 背景颜色   背景url  是否重复   位置 /大小   原点    裁剪方式 */
      background: url('../../images/bg-lt.png') no-repeat left top,
                  url('../../images/bg-rt.png') no-repeat right top,
                  url('../../images/bg-lb.png') no-repeat left bottom,
                  url('../../images/bg-rb.png') no-repeat right bottom;
    }


  </style>
</head>
<body>
  <div class="box1">Hello CSS</div>
  
</body>
</html>